GRTensorII is a package for the calculation and manipulation of
components of tensors and related objects. Rather than focus upon a
specific type or method of calculation, the program has been designed
to operate efficiently for a wide range of applications and allowing
use of a number of different mathematical formalisms. Calculation
algorithms are optimized for the individual formalisms and
transformations between formalisms has been made simple and
intuitive. Additionally, the package allows for customization and
expansion with the ability to define new objects, user-defined
algorithms, and add-on libraries.|
Regardless of the algorithm or formalism used for calculation, it is often the case that only certain simplifications applied at a crucial stages can make some problems tractable. For this reason, GRTensorII has been designed provide full control of the calculation path and the simplifications to be performed at each stage. Once a calculation is completed, a variety of commands are available for the manipulation and simplification of results.
In designing the package, emphasis has also been placed on the interface, allowing simple user input of calculations and tensor definitions, as well as presenting readable output. Metrics and basis vectors are easily defined and can be saved for later use. Calculations are specified in an intuitive manner using a minimal number of commands.
The developers of GRTensorII are: Peter Musgrave, Denis Pollney and Kayll Lake.
GRTensorII allows you to:
GRLite and GRTensorJ are Java based interfaces to GRTensorII.
GRTensorM is a port of an early version of GRTensorII to Mathematica.